Bell and Howell Solar Mole Repeller Bell & Howell Solar Mole Repeller scares off borrowing rodents without harming them! Humane device continuously emits a penetrating vibration sound barely audible to humans, but moles, gophers, groundhogs and mice can't stand it Just stake pole in ground - the attached solar panel is charged by sunlight, so there's no need for electricity or batteries! Safe around children and pets Weatherproof unit stands 15" H.